1 Getting Started
48 E364xA User’s and Service Guide
Connect one end of the sensing lead shield to the chassis ground ( ) only.
Opening a sensing lead causes the power supply’s output voltage to decrease at
the load leads. Observe the polarity when connecting the sensing leads to the
load.
Figure 1-7 Remote voltage sensing connections
Stability
Using remote sensing under certain combinations of load lead lengths and large
load capacitances may cause your application to form a filter, which becomes
part of the voltage feedback loop. The extra phase shift created by this filter can
degrade the power supply’s stability, resulting in poor transient response or loop
instability. In severe cases, it may cause oscillations.
In severe cases, it may cause oscillations. To minimize this possibility, keep the
load leads as short as possible and twist them together. As the sense leads are
part of the power supply’s programming feedback loop, accidental open-
connections of sense or load leads during remote sensing operation have various
unwanted effects. Provide secure and permanent connections.
During remote sensing setup, it is strongly recommended to power off (by
pressing the power ON/OFF button) the power supply to avoid undesirable
damage to the load or the power supply.
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